<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <meta http-equiv="X-UA-Compatible" content="ie=edge" />
  <title>局部过滤器</title>
  <script src="/js/vue.js"></script>
</head>

<body>
  <div id="app">
    <input type="text" v-model="msg">
    {{msg|upperCase|asterisk}}
  </div>
  <div id="app2">
    <input type="text" v-model="msg">
    {{msg|upperCase|asterisk}}
  </div>

</body>

<script>
  let app = new Vue({
    el: '#app',
    data: {
      msg: ''
    },
    filters: {
      upperCase: function (val) {
        return val.toUpperCase();
      },
      asterisk: function (val) {
        var reg = /\d/g;
        return val.replace(reg, '*');
      }
    }
  });
  let app2 = new Vue({
    el: '#app2',
    data: {
      msg: ''
    }
  })
</script>

</html>